Close-up of a steel corner bracket connecting four bamboo poles, reinforced with fiberglass and an epoxy-sand core, in a bright workshop.

A high-detail, ultra-sharp macro photograph inside a brightly lit engineering workshop, showing the mechanical connection of structural members to a custom steel corner bracket. In the center, a 6mm thick raw steel bracket sits flat, with its four square arms bent outwards at 45 degrees. Thick organic bamboo poles, each 10cm in diameter, serve as the main struts and connect to the holes of the bracket. The visible cross-section at the end of a bamboo pole reveals it is completely filled with a solid, textured cast epoxy-sand mixture. The exterior end of the bamboo is tightly wrapped in a distinctive, professional translucent fiberglass composite sleeve (GFK jacket). A heavy-duty, high-strength M20 threaded steel rod emerges perfectly centered from the solid epoxy core and screws directly into a mechanical rod end, which is bolted to the steel bracket's arm. Soft studio lighting highlights the contrast between the natural bamboo texture, the fiberglass wrap, and the industrial sheen of the steel. Crisp focus, shallow depth of field. Mehr sehen